Oh no! Are you joking? You already did what 5lab said to do?

He's a dangerous man! lol

Uh no not yet , I was going to chop down a nice solid oak tree ive seen first thing tomorrow morning , take it to a local saw mill and get them to cut it to size for me. I am going to have to brace the shelf supports with steel girders cut from the severn road bridge and cover it all with reentry tiles from the space shuttle , do you think that will be strong enough ???

The parcel shelf on my mums old Volvo 345 also collapsed under its own weight into the boot, without any speakers mounted in it. Resorted to wedging the shelf in with 2 bamboo canes in the slots where the parcel shelf slots in - though this is all from memory! I think that using an MDF shelf also improves the bass response of the speakers.

Steve

exactly - they really arent very strong ya know. and yes, more rigidity helps the sound quality, and its a better fit for the boot than the origional, which helps keep the inside of the car quiet, and i recon it'd help the rigidity of the car in a crash

I think there's little doubt that an MDF shelf is an upgrade...but I also think yours must have been seriously abused at some point to collapse all by itself! I would have absolute confidence in resting 10kg+ on my shelf for short periods.

cheers

James

*both* of mine have collapsed. *both*. i think thats more than coincidence tbh

There is collapse and collapse...

Red on the pic: collapse can happen, true, but it isn't the part where the speakers are, it's the moving (weak) part.

Yellow on the pic: static part where the speakers are, collapse won't happen except if you put heavy heavy things on it (in that case it's broken and you can replace it!)

Maybe my mum had sat on them both?!

cheers

James

they collapse right at the edge on the yellow part. all that happens is the edge starts to point a tiny bit upwards, and the shelf is no longer quite wide enough to fill the gap

The only bit that's going on mine is the very edge - where you first put it in. It's not bending though - the carpet is just being dragged backwards / off the backing.

cheers

James

Well, mines on 4mm ally sheet, and whether or not the weight thing is an issue, the fact that if you put 6x9's in a shelf, you *will* at some point have them cranked. The inertia from a cone of that size will damage your parcel shelf even if it's not damaged already!!!

And who in there right mind, if they are putting in the effort of running wires etc, wouldn't reinforce the shelf? As has been said before the more rigid a speaker is mounted the sound quality will follow....

Crikey - doesn't the sheet resonate really badly? Or have you damped it down in some way?

cheers

James

Not with the weight of my shelf, no, but the problem is starting to come now from the flappy bit You'll here next month unless I think of a genius plan before then. The thing with my shelf is cos its a cabinet on the shelf, made from 12mm ply, + the speakers it's flippin' heavy!! All the sheet is bolted into the shelf, with damping between the shelf and sheet

It is sad when you start getting problems with your flappy bits LOL

i have to agree with 5lab the shelfs are not great
the shelf was the first thing i replaced on the car and there had not even been 6*9s in it
i think the bigger problem is the plastic boot walls that the shelf lies on there just not good enough! theres not much gap in them